 Eroded pinnacles of pink volcanic tuff looking like a miniature Bryce Canyon on Blue Creek Trail. Big Bend National Park, November 29, 2009
 Slopes of Chisos Mountains from Pinnacles Trail. Big Bend National Park, November 26, 2009
 Fall colors of Chisos Mountains from Pinnacles Trail. Big Bend National Park, November 26, 2009
 Century plant which bloomed, died, and tipped over, on Pinnacles Trail. Big Bend National Park, November 26, 2009
 Group of people with Dallas Sierra Club on Pinnacles Trail. Big Bend National Park, November 26, 2009
 Switchbacks of Blue Creek Trail. Big Bend National Park, November 29, 2009
 Area of red rocks on Blue Creek Trail. Big Bend National Park, November 29, 2009
 Fruit of cholla cactus (cylindropuntia) on Blue Creek Trail. Big Bend National Park, November 29, 2009
 Fruits of Texas madrone (Arbutus xalapensis) on Blue Creek Trail. Big Bend National Park, November 29, 2009
 Weathered wood on Pinnacles Trail near Juniper Flat. Big Bend National Park, Texas, November 22, 2007
 - Pinnacles trail (A trip to Big Bend Park, November 27, 1997, morning and day)
 - Pinnacles trail (A trip to Big Bend Park, November 27, 1997, morning and day)
 - Pinnacles trail (A trip to Big Bend Park, November 27, 1997, morning and day)
 - Pinnacles trail (A trip to Big Bend Park, November 27, 1997, morning and day)
 - Pinnacles trail (A trip to Big Bend Park, November 27, 1997, morning and day)
 - Pinnacles trail (A trip to Big Bend Park, November 27, 1997, morning and day)
 - Pinnacles trail (A trip to Big Bend Park, November 27, 1997, morning and day)
 - Pinnacles trail (A trip to Big Bend Park, November 27, 1997, morning and day)
 - Pinnacles trail (A trip to Big Bend Park, November 27, 1997, morning and day)
 - Pinnacles trail (A trip to Big Bend Park, November 27, 1997, morning and day)
 - Pinnacles trail (A trip to Big Bend Park, November 27, 1997, morning and day)
 - Pinnacles trail (A trip to Big Bend Park, November 27, 1997, morning and day)
 - Pinnacles trail (A trip to Big Bend Park, November 27, 1997, morning and day)
 - Pinnacles trail (A trip to Big Bend Park, November 27, 1997, morning and day)
 - Pinnacles trail (A trip to Big Bend Park, November 27, 1997, morning and day)
 - Pinnacles trail (A trip to Big Bend Park, November 27, 1997, morning and day)
 - Pinnacles trail (A trip to Big Bend Park, November 27, 1997, morning and day)
 Sandy washes of Blue Creek Canyon near Homer Wilson Ranch. Big Bend National Park, November 29, 2009
 - Pinnacles trail - Mandrone (mandrono) (A trip to Big Bend Park, November 27, 1997, morning and day)
 Totem-like columns of volcanic tuff across Limpia Creek, view from Road 17. Fort Davis, Texas, December 29, 2007
 Emory Peak Trail in fog. Big Bend National Park, November 27, 2009
 Boot Spring Trail. Big Bend National Park, November 26, 2009
 Upper section of Boot Canyon Trail. Big Bend National Park, November 27, 2009
 Boot Canyon Trail ending at Southeast Rim. Big Bend National Park, November 27, 2009
 Upper part of Boot Canyon Trail. Big Bend National Park, November 27, 2009
 Pink flowers of pea family on Prairie Trail in Brazos Bend State Park. Needville, Texas, April 11, 2009
 Slopes of Chisos Mountains from Boot Spring Trail. Big Bend National Park, November 26, 2009
 Emory Peak from lower section of Southwest Rim Trail. Big Bend National Park, November 28, 2009
 Cliffs of Toll Mountain from Boot Spring Trail. Big Bend National Park, November 26, 2009
 Slopes of Chisos Mountains east from Boot Spring Trail. Big Bend National Park, November 27, 2009
 White sands from eroded cliffs along the blue trail in western Timna Park, near Eilat. The Middle East, April 25, 2001
 - Blue Creek Canyon (A trip to Big Bend Park, November 29 - 30, 1997)
 - Blue Creek Canyon (A trip to Big Bend Park, November 29 - 30, 1997)
 - Blue Creek Canyon (A trip to Big Bend Park, November 29 - 30, 1997)
 - Blue Creek Canyon (A trip to Big Bend Park, November 29 - 30, 1997)
 Copper minerals in white sand from eroded cliffs along the blue trail in western Timna Park, near Eilat. The Middle East, April 25, 2001
 Southeast Rim in fog. Big Bend National Park, November 27, 2009
 Boot Rock from Boot Spring Trail. Big Bend National Park, November 28, 2009
 Boot Rock, view from Boot Spring Trail. Big Bend National Park, November 27, 2009
 View of Boot Rock from Boot Spring Trail. Big Bend National Park, November 27, 2009
 Boot Rock from Boot Spring Trail at sunrise. Big Bend National Park, November 28, 2009
 Cliffs of South Rim. Big Bend National Park, November 28, 2009
 Dry tree on South Rim. Big Bend National Park, November 28, 2009
 Agaves on South Rim. Big Bend National Park, November 28, 2009
 Dry juniper on South Rim. Big Bend National Park, November 28, 2009
 Casa Grande Peak of Chisos Mountains from Emory Peak Trail. Big Bend National Park, November 27, 2009
 Sunset from SW3 (Southwest Rim) campsite. Big Bend National Park, November 28, 2009
 Cacti and agaves on South Rim. Big Bend National Park, November 28, 2009
 Pine tree on South Rim. Big Bend National Park, November 28, 2009
 Agaves on South Rim at sunrise. Big Bend National Park, November 29, 2009
 Dry juniper tree on South Rim at morning. Big Bend National Park, November 29, 2009
 Crooked pine on South Rim at morning. Big Bend National Park, November 29, 2009
 Fall colors of Boot Canyon. Big Bend National Park, November 27, 2009
 Crooked pine growing on South Rim. Big Bend National Park, November 28, 2009
 Elephant tusk Mountain from Southeast Rim. Big Bend National Park, November 28, 2009
 Upper part of Boot Canyon. Big Bend National Park, November 27, 2009
 East summit of Emory Peak in fog. Big Bend National Park, November 27, 2009
 Most photographed spot with a pine tree on South Rim. Big Bend National Park, November 28, 2009
 Elephant Tusk Mountain from South Rim at sunrise. Big Bend National Park, November 29, 2009
 Pink Canyon (?) from Blue Trail in western Timna Park, 13 miles north from Eilat. The Middle East, November 7, 2002
 Gorman Falls (view from a trail) in Colorado Bend State Park. Bend, Texas, May 23, 2009
 Group of people with Dallas Sierra Club on Southeast Rim. Big Bend National Park, November 27, 2009
 Blue heron bird near Pilant(?) Lake in Brazos Bend State Park. Needville, Texas, April 11, 2009
 Spores (in KOH) of some pinkgill (Entoloma)(?) mushrooms (stem is tuff, spore print pinkish), collected on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, November 18, 2023
 Santa Elena Canyon and mountains in Mexico from SW3 (Southwest Rim) campsite at sunrise. Big Bend National Park, November 29, 2009
 Spores (in lugol) of some pinkgill (Entoloma)(?) mushrooms (stem is tuff, spore print pinkish), collected on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, November 18, 2023
 Group of peole with Dallas Sierra Club watching sunset from SW3 (Southwest Rim) campsite. Big Bend National Park, November 28, 2009
 Tuff puffball mushroom (Scleroderma texense) in Bee Creek Park. College Station, Texas, November 3, 2017
 Agave on Smokey Creek Trail. Big Bend National Park, Texas, November 24, 2007
 Mule Ear Peaks from Smokey Creek Trail. Big Bend National Park, Texas, November 25, 2007
 Tuff puffball mushroom (Scleroderma texense) on roadside in Lick Creek Park. College Station, Texas, November 12, 2013
 Drooping juniper (Juniperus flaccida Var. flaccida) on Southeast Rim. Big Bend National Park, November 28, 2009
 East summit of Emory Peak, with north summit visible in fog. Big Bend National Park, November 27, 2009
 Smokey Creek Trail north from Mule Ear Peaks. Big Bend National Park, Texas, November 25, 2007
 Smokey Creek Trail east from Mule Ear Spring. Big Bend National Park, Texas, November 25, 2007
 Mature tuff puffball mushroom (Scleroderma texense) on roadside in Lick Creek Park. College Station, Texas, November 16, 2013
 Texture of tuff puffball mushroom (Scleroderma texense) on roadside in Lick Creek Park. College Station, Texas, November 12, 2013
 Texture of tuff puffball mushroom (Scleroderma texense) on roadside in Lick Creek Park. College Station, Texas, November 16, 2013
 Dallas Sierra Club on Smokey Creek Trail at rain. Big Bend National Park, Texas, November 24, 2007
 Ocotillo on Smokey Creek Trail north from Mule Ear Peaks. Big Bend National Park, Texas, November 25, 2007
 Cracked surface of tuff puffball mushroom (Scleroderma texense) on roadside in Lick Creek Park. College Station, Texas, November 16, 2013
 Bee Mountain, view to the west from Smokey Creek Trail near Mule Ear Spring. Big Bend National Park, Texas, November 25, 2007
 Desert mistletoe(?) growing on ocotillo, view from Smokey Creek Trail. Big Bend National Park, Texas, November 25, 2007
 Pitaya(?) cactus on Smokey Creek Trail east from Mule Ear Spring. Big Bend National Park, Texas, November 25, 2007
 Valley of Smokey Creek, view to the east from a trail north from Mule Ear Peaks. Big Bend National Park, Texas, November 25, 2007
 Goat Mountain, view to the north from Smokey Creek Trail near Mule Ear Spring. Big Bend National Park, Texas, November 25, 2007
 Smokey Creek Trail through creosote bushes and cacti east from Mule Ear Overlook. Big Bend National Park, Texas, November 25, 2007
 Tuff puffball mushrooms (dirty tennis ball fungi, Scleroderma texense) on roadside in Lick Creek Park. College Station, Texas, November 12, 2013
 Gorman Falls in Colorado Bend State Park. Bend, Texas, May 23, 2009
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